"Pete C." wrote in message
...
pbs wrote:

wrote:
On 19 Jun 2006 13:28:36 -0700, "pbs" wrote:

Hi:
Can #12 THHN be run through 1' gray PVC Electrical conduit?

If Yes, what is the code fill rate for 1" PVC? ( I believe that 1" EMT
can handle 18 #12 THHN maximum.)

Thanks


Table C10 says 25 #12 THHN will fit is 1" sch 40 PVC rigid nonmetalic
conduit

Thanks. I had also intended to ask if the PVC conduit is permitted for
interior residential applications (this would run up through a chase)

That would likely be a local code issue, it's not something in the NEC.
I doubt you'd have an issue since PVC DWV stacks do the same thing with
the same materials.

Pete C.

I found that PVC ENT systems have far fewer choices when it comes to J-boxes
and those J-boxes tended to have a different standard for hole position so
that you had to use the more expensive covers.

Metal may be a bit more work cutting the tubing and connecting ground
pigtails at each J box but you will have lots more options at the ends of
the tubing to put those fixtures on. Transitioning to cable (romex) is
easier too using a simple clamp to hold the cable.

What money you may save using PVC conduit you will loose buying more
expensive plastic J boxes, elbows and tees.

On the other hand, you can drill a 3/4" hole in the side of a plastic J box
and thread a 1/2" male adapter to create more options (3 and 4 way J-boxes
for example). Don't know if that is to code but I don't really see a reason
for it not to be as long as you observe other rules about fill and glue all
connections.